Fix NVIDIA Kepler Logic & Kernel Headers

- Normalized PCI ID case sensitivity in `_helpers.sh`. The `detect_nvidia_arch()` function now converts input to uppercase (`${1^^}`) to match legacy architecture map keys, resolving "unknown" detection for all NVIDIA GPUs.
- Removed silent fallback to standard drivers in `gpu.sh` Bookworm logic. Kepler and other architectures now invoke specific installation functions directly without defaulting to unsupported driver versions (e.g., 535).
- Corrected NVIDIA legacy package name in `nvidia.sh`. Updated `_install_nvidia_bookworm_kepler()` to use `nvidia-tesla-470-driver` instead of deprecated Bullseye naming conventions for Debian 12.
- Replaced specific kernel header references (`linux-headers-$(uname -r)`) with meta-package `linux-headers-amd64` in `firmware.sh`. Fixes DKMS installation failures for Broadcom/WiFi drivers across multiple Debian versions.

modules/firmware.sh

@@ -277,17 +277,17 @@ After the firmware is downloaded, reboot the system." 14 75
         else
             local bcm_ver header_ver
             bcm_ver=$(apt-cache policy broadcom-sta-dkms 2>/dev/null | awk 'NR==3 {print $2; exit}')
-            header_ver=$(apt-cache policy linux-headers-$(uname -r) 2>/dev/null | awk 'NR==3 {print $2; exit}')
+            header_ver=$(apt-cache policy linux-headers-amd64 2>/dev/null | awk 'NR==3 {print $2; exit}')
 
-            if ! apt-cache policy "linux-headers-$(uname -r)" 2>/dev/null | grep -q "Candidate: [^ (none)]"; then
+            if ! apt-cache policy linux-headers-amd64 2>/dev/null | grep -q "Candidate: [^ (none)]"; then
                 _msg "Broadcom Error" \
-                    "linux-headers-$(uname -r) not available.\n\nCannot compile broadcom-sta-dkms without kernel headers." 10 60
+                    "linux-headers-amd64 not available.\n\nCannot compile broadcom-sta-dkms without kernel headers." 10 60
                 _pause
                 continue
             fi
 
-            if _confirm "Broadcom WiFi" "Install Broadcom driver?\n\nRequired for this chipset. Compiles a kernel module.\n\n  broadcom-sta-dkms          ${bcm_ver:-unknown}\n  linux-headers-$(uname -r)  ${header_ver:-unknown}\n\nProceed?"; then
+            if _confirm "Broadcom WiFi" "Install Broadcom driver?\n\nRequired for this chipset. Compiles a kernel module.\n\n  broadcom-sta-dkms          ${bcm_ver:-unknown}\n  linux-headers-amd64        ${header_ver:-unknown}\n\nProceed?"; then
-                _run_cmd "Broadcom" "sudo DEBIAN_FRONTEND=noninteractive apt install -y linux-headers-$(uname -r) broadcom-sta-dkms" \
+                _run_cmd "Broadcom" "sudo DEBIAN_FRONTEND=noninteractive apt install -y linux-headers-amd64 broadcom-sta-dkms" \
                     "Installing Broadcom driver..."
 
                 local has_broadcom_bt=false

modules/gpu.sh

@@ -181,11 +181,7 @@ _install_nvidia_stack() {
 
     elif [ "$DEBIAN_VERSION" = "12" ]; then
         if [ "$(is_nvidia_kepler)" = "true" ]; then
-            if type _install_nvidia_bookworm_kepler &>/dev/null; then
             _install_nvidia_bookworm_kepler
-            else
-                _install_nvidia_standard
-            fi
         elif [ "$(is_nvidia_fermi)" = "true" ]; then
             _msg "NVIDIA Fermi — Bookworm" \
                 "Fermi GPUs (GF1xx) are not supported\nin Debian 12 (Bookworm).\nThe nvidia-legacy-390xx driver is\nnot available in this version.\n\nNo NVIDIA driver will be installed."

modules/gpu/_helpers.sh

@@ -23,7 +23,7 @@ declare -A NVIDIA_FAMILY_MAP=(
 )
 
 detect_nvidia_arch() {
-    local pci_id="$1"
+    local pci_id="${1^^}"
     local prefix="${pci_id:0:2}"
     echo "${NVIDIA_FAMILY_MAP[$prefix]:-unknown}"
 }

modules/gpu/nvidia.sh

@@ -199,7 +199,7 @@ _install_nvidia_bookworm_bpo() {
 # sin pasar por nvidia-detect (evita falsa recomendación rama 535)
 # -------------------------------------------------------------------
 _install_nvidia_bookworm_kepler() {
-    local nv_pkg="nvidia-legacy-470xx-driver"
+    local nv_pkg="nvidia-tesla-470-driver"
     local nv_ver
     nv_ver=$(apt-cache policy "$nv_pkg" 2>/dev/null | awk 'NR==3 {print $2; exit}') || true